Other Non-Current Assets (Other non-current assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Other Assets, Noncurrent Disclosure [Abstract]
Cloud computing implementation costs	$ 6,247	$ 4,690
Less: accumulated amortization	(354)
Other non-current assets	5,893	4,690
Finite-Lived Intangible Assets, Accumulated Amortization	35,001	31,254
Finite-Lived Intangible Assets, Net	$ 97,719	$ 101,466